Automatic trip for printing-presses.



NI. A. DROITCOUR.

AUTOMATIC` TRIP FOR PRINTING PRESSES. APPLICATION FILED Nov. 27. 1914.

l 9 l 8 1 ,58 1 Patent-ed May 2, 1916.

2 SHEETS-SHEET I.

I. IIIIIIIIIIIIIIIL WlTNESSE r w I |NVENTOR. /Z' Ma/Imm,

IVI. A. DROITCOUR.

AUTOMATIC TRIP FOR PRINTING PRESSES.

APPLICATION FILED N0V427I1914.

Patented May 2, 1916.

wI-NIissI-:sz-

r namen.

OHIO.

AUTOMATIC TRIP FOR PRINTING-PRESSES.

Speciicatioil of Letters Patent.

ratemeaaray 2, wie.

Application led November 27, 1914, Serial No. 874,273.

To all u1/1.0m z'trmay concern:

Be it known that I, MICHAEL A. DROIT- coun, a citizen of the UnitedStates, and a resident of Delphos, in the count-y of Van' Vert andState' of Ohio, have invented a certain new and useful Automatic Tripfor Printing-Presses; and I do hereby declare the following to be afull, clear, and exact description of the invention, such as will enableothers skilled in 'the art to which it appertains to make and use thesame, reference being hadI tothe accompanying drawings, and to thevcharacters of reference marked thereon, which form a part of thisspecification,

My inventionl relates to printing presses or the like, and particularlyto automatic trip means therefor.

The primary object of my invention is the provision, in combination Withthe trip mechanism of a printing press, of simple and efficienty meanswhich' is automatically operable to trip such -mechanism upon thefailure to feed a sheet to be printed into position to be gripped by thegripping means of the press. y

Other objects and advantages ofv the invention will be apparent from thefollowing detailed description thereof. v

The invention is fully described in the following specification, andwhile, in its broader aspect, it is capable of elnbodiment in numerousforms, a preferred embodiment thereof is illustrated in the accompanyingdrawings, in Which,-

Figure 1 is 'a plan View of a portion of the printing press embodying myinvention with a sheet fed into gripping position. Fig. 2 is an enlargedside elevation of the upper portionthereof with parts broken away. Fig.3 is a similar'side elevation of the invention and the portion of themachine with w'hich it is associated including the connection of thesame with the trip mechanism. Fig. 4 is an enlarged rear ele-l vation ofthe left end portion of Fig. 1 looking in thedirection of the arrow (L,and Fig.r5 is a partial enlarged section on the line zr. :a in Fig. 1.

Referring to the drawings. 1 designates a press frame` and 2 thecustomary platen cylinder. which is carried by a shaft 3, the ends ofwhich are journaled in bearing blocks 4. mounted for vertical movementsin the respective side portions of the frame lintervals torst obstructto permit vertical movements of the cylinder to place it int and out ofoperative printing posltion.

5 designates the foottrip lever of a trip mechanism which is operableupon a depression of said lever to effect a throwing out of the cylinderlowering mechanism to prevent the taking of an impression. Numerousforms of trip mechanisms are employed, and as the invention does notreside in the form of such mechanism, the same is not shown herein. Itwill be sufficient for an understanding of the present invention torefer to the part 5 as the trip mechanism, as its connection with thecylinder by one mechanism or another is well understood in the art.

Mounted over the cylinder 2 in bearing brackets 6, 6, rising from therespective frame sides, is a rock-shaft 7, which carries the customarygage lingers 8 for the sheets 9. When the gage fingers 8 are in sheetobstructing position they .rest on fingers 10a projecting from theforward edge portions of the feed table 10 of the press, and said gagefingers are rocked at predetermined the passage of a sheet over thetable and then to free it, as is well understood in the art, by arocking of the shaft 7, such rocking being effected lby any suitablemechanism, a part of Which is shown at 11 at the right of Fig. 1.

Mounted, in the present instance, in advance of the shaft 7 is arock-shaft 12, which is rotatably supported at its ends by pin bearings13 and 14, the bearing 13 being adjustably carried by the right handbearing bracket 6, and the bearing 14 comprising a rock-shaft which isjournaled in bearing arms projecting from a bearing bracket 15 risingfrom the left hand side of the press frame. The rock-shaft 14 has theendthereotl adjacent to the shaft 12 pointed to form a pin point bearingfor said'shaft and` carries rocker-arms 16 and 17 at the outer and innerends thereof, respectively, which arms coact with the bearing arms forsaid shaft to prevent endwise movement thereof. A spring detector finger1 8 projects rearwardly from the rock-shaft 12, at its center portion,in the present instance, and when such linger islowered as hereinafterdescribed, the free end thereof rests upon a sheet 9, which has been fedto the guides 8 and if a sheet is not in position l a registeringopening 19 in a registering ing upward from the inner end of the dog,

table finger 10b and effects an automatic tripping of the cylindeitlirow-out oi trip mechanism. as hereinafter described.

Projecting forward from the left-hand end of the rock-shaft 12 is a dog20 the nose of which coacts with the upper end of a spring pressed leveror arm 21. b otli when the detector finger 18 rests on the sheet 9 andwhen it is raised therefrom, the dog being moved to entirely release thearm 21 only when the detector finger 18 passes down into or through thetable opening 19.

The arm 21 is fixed to a lrock-shaft 22 that is journaled in the bearingbracket 15, and an arm 23 projects downward from said shaft and isprovided with an eye at its lower end through which the free end of ahorizontally disposed rod 24 loosely pro- 'ects, the opposite end ofsaid rod being pivoted for vertical swinging movements to the frameside, as at 24a. A coiled compression spring 25 is mounted on the rod 24intermediate the arm 23 and a stop pin or `inember 2G on the rod.thereby exerting a pressure on the arm 23 which tends to force the arm21 into coaction with the dog 20 and toward the shaft 12.

The arm 16 which projects from the outer end portion of the shaft 14cariies at its free end a roller 27. which rides on a. cam 28 that isfixed to a shaft 29, which shaft is journaled ina bracket arm 30 risingfrom the outer side ofy the respective bearing block 4. A gear 31 on anend of the c vlinder shaft 3 meshes with and drives a larger gear 32 onthe cam shaft 29, said gears being so proportioned that the shaft 29makes one revolution to each two revolutions of the cylinder 2. The cam28 is provided in its periphery with a depression or recess 28L intowhich the roller 27 diops at each revolution of the cam 28 to effect arocking of the shaft 14. The passing of the roller 27 into the camdepression 28a is timed to take place immediately after each sheet 9.when properly feeding, moves into contact with the gage fingers 8.Project- 20 is a pin 33. When the roller 27 is riding on the raised orneutral portion of the cam 28, a pin 34. which projects from the arm 17engages the pin 33 and retains the rock-shaft 12 in position to elevatethe detector-finger 18 above the table 10 and to retain the nose of thedog 20 in engagement with the lever 21. into the cam recess 28a the pin34 is swung rearward to release the pin 33 and to permit the finger 18to swing downward by gravity into sheet coacting position. and, if asheet ,is not in finger obstructing position. to then swing downwardthrough the opening 19 a 'Vhen the roller 27 drops sufficient extent torock the nose of the dog 20 out of engagement with the arm 21.

An arm 35 fixedly projects from the shaft 22 and carries a roller 36 atits free end for riding on the peripheryvof a cani 3T. which is fixedlycarried by the shaft 29 at one side of' the cam 28. The cam 3T isprovided in its periphery with a depression 3T:L into which the roller3G may drop at a predetermined point in a revolution of the shaft 29 ifthe arm 21 is free to swing under the action of the spring` 25 by reasonof the dog 2() being rocked to unobstructing position. which only occurswhen the detector finger 18 lowers and there is no sheet in position toarrest its lowering movement. The arm 35 is provided at its` inner endwith a wiper nose or extension 38, which upon a rocking of the arm, dueto its roller dropping into the cam recess 3T, coacts with and forcesthe upper end of a catcli-bar 39 from catch engagement with a stationarycatch or shoulder 40 on the press frame. The catch bar 39 extendsdownwardly from the catch 40, being guided for vertical movements by aguide member 41projecting from the frame, and has its lower endpivotally connected to vthe forward end of a horizontally-disposed`lever 42. which extends over the foot lever 5 and is pivoted to theframe, as at 43. The lever 42 has a link 44 pivotally dependingtherefrom in advance of its fulcrum 43 and provided at its lower endwith a vertical slot 45. which receives a pin 46 projecting from a sideof the foot trip lever vhen the trip lever 5 isin its normal or raisedposition, the upper end wall of the link slot 45 bears downward againstthe pin 46 so that said trip lever 5 will be lowered upon the release ofthe catch bar 39 from the catch shoulder 40 and a downward movement ofthe lever 42, thereby operating the cylinder trip mechanism to raise thecylinder from operative position. The downward movement of the catch bar39 and lever 42 are urged by a coiled contractile spring 4T, whichconnects the frame and catch bar in a manner to cause a constantdownward pulling action on the catch bar. The rear end of the lever 42is extended rearwardly from the fulcrum 43 to enable the exertion offoot or other downward pressure on such end of the lever to effect araising of the forward end of the lever 42 and a consequent restoring ofthe catch bar 39 to its catch engagement with the catch member 40. thusl again placing the trip mechanism embodying my invention in operativeposition.

It willv be understood in the operation of my invention that a sheet 9is gripped by the cylinder gripping means at every other revolution ofthe cylinder, and that the cams 28 and 37 are geared to make a singlerevolution for each two revolutions of the cylinder; and also that thecam recess 28 in the cam 28 is positioned to permit a lowering of thedetector finger 18 into sheet engaging' position immediately after eachsheet 9 is or should have been fed into coaction with the gage-fingers8, and that the cam depression 37a in the cam 37 is positioned to permita `dropping of the roll 36 therein and a consequent tripping of thecylinder trip mechanism at the in a cycle of operations of the press.Should a sheet be missed in the feeding action, the detector finger 18will be permitted to pass through the opening 19 in the table finger10b, thus effecting a sufficient upward rocking of the dog 2O to move itout of register with the arm 21 and permitting the roller 36 to beforced into the cam depression 37a by the action of the spring 25 whensaid cam depression is moved into register with the roller. The rockingof the arms or lever parts which are carried by the shaft 22, whichrocking is effected upon the movement of the roller 36 into the camdepression 37a causes a kicking of the catch bar 89V from catch"engagement with the stationary catch 40, thus permitting said catch barand the forward end .of the lever 42 to lower under the action of thespring l17 and to force-the trip -lever 5 downward to tripping position.It will be understood that the detector finger 18 lowers within theperipheral opening of the cylinder., and the raising of such fingertakes place in time to prevent an interference or clashing of the fingerand cylinder.

I wish it understood that my invention is not limited to any specificconstruction, arrangement or form of the parts except in so far as suchlimitations arespecified in the claims.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is,--

1. The combination with a cylinder trip mechanism of a printing press,of a rocker member carried independently of the press cylinder andmovable into and outof sheet coacting position and movable beyond suchposition when the feeding of a sheet in proper order is missed, meansoperable to periodically raise said member from sheet coacting positionand then to release it to permit an automatic lowering thereof to sheetcoacting position or beyond the same, means automatically operable totrip said mechanism, and a part ,for coaxial rocking movements with saidmember and coacting with said mechanism tripping means to preventtripping movements thereof except when said member has moved beyondsheet gripping position.

` In a printing press, the combination with a movable sheet picking uppart to which sheets are intermittently fed, and a trip mechanism forthe press,-of a member proper tripping period.

vertically movable into and out of sheet coacting position when sheetsare at a predef termined point in their feeding movements and prior tobeing engaged by said part, said member having an abnormal movement whenits movement in one direction is not stopped by a sheet, means-operableto control the movements of said member, means having connection withand operable to trip said mechanism, a part fixedly attached to andmovable with said member and coacting with said trip meansto preventtripping movements thereof except when the member has moved to abnormalposition, and means coperating with said trip means to prevent trippingmovements thereof except at a predetermined point in a cycle ofoperations of the press. l

3. In a printing press, the combination with a cylinder, and a tripmechanism therefor, of a member separate from said cylinder mounted forrocking` movements and normally movable lto sheet coacting position andbeyond such position if the movement of the member is not obstructed bya sheet, means having a operable to periodically move said member fromsheet coacting position, meanshaving connection with said member andautomatically operable to effect a tripping of said mechanism upon amovement of said member beyond sheet coacting position, and means havinga rotatable control part and operable to permit mechanism trippingmovements of said tripping means to take place at a predetermined pointonly in a cycle of operations of the press.

Inv a printing press, the combination with a cylinder, and a tripmechanism therefor, of a catch part, means for catch engagement withsaid part and operable upon its release from the part to effect atripping action of said mechanism, means operable to effect a release ofsaid catch means from said part at a predetermined point in a cycle ofoperations of the press, and means normally locking said release meansagainst movement and having a sheet-feed detector part and beingoperable to release said release means upon the missing of the feedingofeach'sheet in proper order to the cylinder.

5. In a printing press, the combination with a cylinder, and 'atrip'mchanism therefor, of rotary cam means, trip means having a partfor coaction with said means and operable at a predetermined point in amovement of said cam means to effect a tripping of said mechanism, andmeans having a rocker part periodically movable into and out of sheetVcoacting position and beyond such position when its movement is notobstructed by a sheet, said last means having locking connection withsaid trip means except when said part has movedlbeyondsheet coactingposition,

rotatable control part and ingl locked thereby against catch releasing'Amovement except when said first rocker rocking movements 6. Ir aprinting press, the combination with a cylinder, and a trip mechanismtherefor, of mechanism having a rotary control part operable to effect atripping of said trip mechanisml at a predetermined point in a cycle ofoperations of the press, rocker means carried independently of saidcylinder normally locking said second mechanism in inoperative positionand automatically operable to release said second mechanism .upon amissing in the feeding of a sheet in proper order to the cylinder, andmeans operable to impart predetermined rocking movements to said rockermeans.

7. In a printing press, the combination with a cylinder and a tripmechanism therefor, of rocker means having a finger movable into and outof sheet coacting position and beyond said position when not obstructedby a sheet, control means for said rocker means periodically operableduring a running ofthe press to impart predetermined to said rockermeans, a stationary catch-part, catch means adapted to engage said catchpart and being operable when released from said catch' part to effect atripping of'said trip mechanism, a second rockenmeans Which is normallyurged to coact with land move said catch means from yengagement withsaid catch part, said second rocker means having connectionl with saidfirst rocker means and bemeans has moved beyond sheet coacting position,and cam means coacting with said second rocker means to prevent a catchreleasing movement thereof until a predetermined point in a cycle ofoperations of the press has been reached. A i

8. In a printing press, the combination with a cylinder, and a tripmechanism therefor, of a rock shaft carried independently of saidcylinder, a detector linger projecting from said shaft and normallymovable into position to coact with a sheet when in cylinder grippingposition and to have abnormal movement beyond such position when afeeding of a sheet is missed, means periodically operable to rock saidshaft to raise the finger from sheet coacting position and then torelease the shaft, rocker means normally movable in one direction, meanslocking said rocker means against movement from normal position of itsmovement and operated to release the same upon an abnormal movement ofsaid finger, means coacting with said rocker means to prevent a movementthereof from its locked position until a predetermined point in a cycleof op,

erations of the press has been reached, and

means whichl is rendered operable by a movement of said rocker meansfrom ,locked position to effect a tripping of said mechanism. 9. In ilmachine of the class described, the

speed with respect to combination with a trip mechanism therefor, ofrocker means having a stationary axis and having a detector fingermovable into and out of position to coact with articles when at rest andin position to be picked up by the machine for subsequent operation,said member having an abnormal movement upon the failure in feeding ofan article in proper order to the machine, a locking finger carriedby-said rocker means for rocking movements therewith, means operable toperiodically impart predetermined rocking movements to `said rockermeans, and a control mechanism for said trip mechanism, said controlmechanism being normally locked against trip releasing movements by saidlock finger and being released upon an abnormal movement of saiddetector finger. l0. In a printing press, the combination with acylinder trip mechanism, of a rock shaft having a lock finger and adetector finger projecting therefrom, the detector finger serving tolimit the rocking movements of the shaft in one direction by contactwith a sheet disposed in cylinder picking up position, meansperiodically operable to rock said shaft in one direction to effect araising of the detector finger and then to release the shaft to permit alowering movement of the detector finger into sheet coacting position,and means operable to trip said mechanism, said last mentioned meansbeing normally locked against mechanism tripping movement by saidlock'finger and released upon a movement of the detector finger beyondsheet coacting position.

11. Ina printing press, a. cylinder, a trip mechanism for the cylinder,rocker means having a detector finger'an'd a lockV finger, the rockingmovements of said means in one direction being limited by ,contact ofthe detector finger with a 'sheetlwhen in cylinder picking upposition,:cam'ricontrolled means periodically operablef` to;I rock saidrocker means in one direction and then to release it to permit amovementvl of the detector finger to sheet coacting position and pastsuch position if not obstructed by a sheet, a second rocker means urgedto have rocker movements in one direction to effect a tripping of saidtrip mechanism and prevented from movement in such direction by the lockfinger of said first rocker means except when the detector finger ofsaid first rocker means has moved past sheet coacting position in asheet detecting movement thereof.

12. In a printing press, the combination with a cylinder. and a tripmechanism therefor, of a pair of rotating cams, means for driving saidcams at a predetermined the rotation of the cylinder, rocker meanshaving a detector finger for coacting with a sheet when in cylinderpicking up position to limit the rocking movements 0f said means in onedirection, means coacting with and operated by one of said cams 'tointermittently rock said rocker means in one direction and then torelease it to permit a movement of the detector linger to sheet coactingposition, releasing means for said trip mechanism normally urged to havemechanism releasing movements and coacting with said other cam and withsaid rocker means whereby it is prevented from movement in the directionfrom which it is urged until the coacting cam has' reached apredetermined point in a revolution thereof and until the detectorfinger of said rocker means has moved past sheet coaeting position.

13. In a printing press, the 'combination with a cylinder, and a tripmechanism therefor, of a rock shaft having a detector linger and a lockfinger projected therefrom, the detector finger being .adapted to coaciwith a sheet when in cylinder picking up position to limit the rockingmovements' in one direction of said shaft and to permit abnormal rockingmovements of the shaft when the movement of the detectorl finger is notstopped by a sheet', cam controlled means periodically operable to rocksaid slaft and fingers in one direction and then to release them topermit a return .thereof tonormal sheet coacting position, rocker 'meansnormally locked against rocking movements in one direction by saidlocking linger, means urging a movement of said rocker means in lthedirection vin which it is locked by said lock finger, a cam coactingwith said rocker means and operable to prevent the rocking movementthereof except at a predetermined point in a cycle `of operations of thepress, said lock finger being moved to release said rocker means by amovement of the detector finger past sheet coacting position in a sheetdetecting movement thereof, and "said rocker means beingoperable whenreleased to effect a tripping of said mechanism.

In testimony whereof, l have hereunto signed Amy name to thisspeciication in the presence of two subscribing Witnesses.

MICHAELV A. DRITCOUR. `Witnessesz` M; F. Weens, N. A. Wmmms

